Scaffold and staging



(No Model.)

Patented May 1, 1888.

E W H 3? u I I [L J WITNESSES, IJVV'ENTOR. ficvzdua' fidlen N. .PEIERS.FhahrLllhngraphar. Waihinginl. I). C.

UNITED STATES PATENT OFFICE.

NICHOLAS STADLER, OF MANITOWOO, WISCONSIN.

SCAFFOLD AND STAGING.

SPECIFICATION forming part of Letters Patent No. 382,245, dated May 1,1888.

Application filed January 10, 1888. Serial No. 260,369.

- its object the provision of anew and improved device for raising thescaffold-sections the desired extent so as to place thereon the ends ofthe foot-boards and firmly hold the elevated parts at the desired point.

The invention comprises the detail constructlon, combination, andarrangement of parts, substantially as hereinafter fully set forth, andparticularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in side elevation of myinvention with a vportion of the inclosingcasin'g removed. Fig. 2 is afront view thereof, showing parts broken away. Fig. 3 is a detail viewof the inclosing casing or post. Fig. 4 is a detail view of theoperating-lever. Fig. 5 is a detail view of the upper end of the post,showing the means employed for securing the end of the crossplank; andFig. 6 represents front and side news of the post or bar and extensiblesection. Referring to the drawings, A designates the inclosing casing orpost,provided with a front removable section, a,which is held in itsnormal position by a top cap, a, having a depending flange, a, and lowerside hooks, a engaging eyes, as shown. In'the upper portion of the rearof the post is formed an opening, a, opposite to which, in the frontremovable section, is a second opening, a as shown.

B 1s a spur wheel or pinion secured upon a shaft, 1), passed throughsuitable bearings on v the front section, a, and upon the outerprojeoting end of this shaft is keyed a ratchetwheel, b, as shown. Thewheel or pinionBis preferably provided with a hexagonal-shaped openingto fit a correspondingly-shaped por tion of the shaft 1), and it is thusheld rigid with said shaft.

O is a lever provided with a finger, W, designed to engage the teeth ofthe ratchetwheel b, said lever being securedin position by (No model.)

. eye plates b passed onto the shaft b on either side of the wheel b.

D is a vertically-sliding post or bar designed to pass through thecasing or post A and cap a, and is provided on its front side with atoothed segment or rack-bar, d, with which engages the wheel or pinionB. To the cap a is secured a pawl, d, designed to engage with therack-bar d, and thereby hold the sliding post or bar in its elevatedposition. To the top of the cap a are also secured pawls d d, the endsof which bear against the sides of the post or bar D. The upper end ofthe sliding post or bar D is provided with an ofiset or shoulder,dflwhereon rests the cross-plank E of the scaffold, said plank beingsecured in position by means of two corresponding plates or straps, e e,secured to the sides of the upper end of the post or bar D, said platesor straps being connected by bolts 6, whereon work handled nutsefiwhereby the operator can readily fasten or loosen the hold on saidcross-plank.

To the front, rear, and sides of the casing or post A are pivotallysecured or hinged the upper inner ends of inclined braces or supporting-bars F F, the outer lower ends of which bear upon the ground orfloor to hold the post A steady in position.

In practice the ends of the cross-planks are secured to the upper endsof the sliding posts or bars of two similar raising or elevatingdevices, and when it is desired to raise or elevate said cross-plank thesame is effected by the operator grasping the lever G,and bearing wheelb and shaft b, together with the spur wheel or pinion B, which, engagingwith the rack-bar d of the sliding post or bar, will effect the raisingthereof, said rack bar being also engaged with the pawls d and d", whichholds said post or bar in posit-iomwhen the operator can, if desired,repeat this operation and raise the post or bar to a still greaterextent.

As it is often desirable to elevate the post or bar D beyond the limitof which it is itself capable, I have formed in the lower end of saidpost or bar a groove or recess, f, wherein is designed to be secured theupper end of an extensible section, G, (shown in Fig. 6,) said sectionbeing a counterpart of the post or bar down thereon will effect theturning of the to near its full extent and it is desired to stillfurther raise'the same, the extensible section G is secured thereto byremoving the front section, a, of the casing or post A and bolting theends of said post or bar and section together by bolts the opening a inthe rear of said casing or post enabling this to be done. After this isaccomplished, the front section, a, is replaced, and by manipulating thelever the posts or bars can be still further elevated and thescaffolding formed upon the crossplanks. By means of the pawls d d" alldownwardmovement ofthe post or baris prevented. From the foregoingdescription of' myinvention it will be seen that I have provided simpleand highly eflicient Ineansfor securing the ends of a cross-plank of ascafl'old, and also for raising or elevating the same to any desiredextent and firmly holding the same when ele vated.

I claim as my invention- 1. The combination,with the casing or posthaving a removable front section and an opening in its rear wall, andthe cap having the pawls connected thereto, of the vertically-slid ingpost or bar operated by a pinion and lever, and the extensible sectionscapable of being secured to said post or bar, substantially as shown anddescribed. 7

2. The casing or post having the cap on its upper end, the sliding postor bar having a rack-bar on its front face, the single pawl d. engagingsaid rack-bar, and the pawls secured to said cap and bearing against thesides of said post or bar, substantially as shown and described.

3. As an improvement in scaffolds, the easing or post having a removablefront section, the sliding post or bar having a recessed lower end, andthe extensible section designed to be secured to said grooved end of thepost or bar, substantially as shown, and for the purpose stated.

In testimony whereof I affix my signature in presence of two witnesses.

N ICHOLAS S'IADLER. Witnesses:

O. A. YIELoW, JOHN CHLOUPLK.

